TRANSDUCER WITH INTEGRATED SENSOR

摘要

An electroacoustic transducer includes a housing and a moving portion adapted to move relative to the housing. The moving portion has a first surface and includes a first electrode (406). A second electrode (402) on a first surface of the housing is located proximate to a first region of the first electrode (406), and a third electrode (404) on the first surface of the housing is located proximate to a second region of the first electrode (406). A capacitance between the first and second electrodes and a capacitance between the first and third electrodes vary similarly with displacement of the moving portion relative to the housing. An impedance buffer is coupled to the second electrode (402) and the third electrode (404).